Connection switching apparatus for three-phase induction motor
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United States of America Patent
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-
Dec 3, 1991
Grant Date -
N/A
app pub date -
Aug 4, 1989
filing date -
Dec 17, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Low rotational speed characteristics of a three-phase induction motor driven by a PWM inverter are improved by rapid .DELTA.-Y connection switching by semiconductor switches (1, 2, 3, 4, 5), for example, TRIAC's.
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